{"product_id":"pentairhcseriescontrolvalver172439penr172439","title":"Pentair HC Series Control Valve | R172439","description":"\u003cdiv\u003e\n  \u003ch2\u003ePentair Rainbow HC Series Control Valve | R172439\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The Pentair Rainbow R172439 is the replacement control valve used on Pentair Rainbow High Capacity (HC Series)\n    automatic chemical feeders\/chlorinators. This valve is used to regulate the feeder’s output by controlling the\n    water flow through the unit, helping you dial in consistent sanitizer delivery once your pool’s baseline demand\n    is established.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eCompatibility\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Pentair Rainbow High Capacity automatic feeders\/chlorinators models \u003cstrong\u003eHC-3315\u003c\/strong\u003e, \u003cstrong\u003eHC-3330\u003c\/strong\u003e, \u003cstrong\u003eHC-3340\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUse case:\u003c\/strong\u003e Replacement part where the feeder parts diagram calls for \u003cstrong\u003eR172439\u003c\/strong\u003e control valve\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWhat This Part Does\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eAdjusts and maintains the feeder’s output by managing internal water flow through the chlorinator body\u003c\/li\u003e\n    \u003cli\u003eHelps prevent “over-feeding” or “under-feeding” caused by a worn, sticking, or leaking valve assembly\u003c\/li\u003e\n    \u003cli\u003eRestores proper adjustment range when the existing control valve is damaged or difficult to turn\/set\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eCommon Signs It Needs Replacement\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eFeeder output won’t adjust normally (stuck at high\/low)\u003c\/li\u003e\n    \u003cli\u003eValve is hard to turn, binds, or won’t hold a setting\u003c\/li\u003e\n    \u003cli\u003eUnexplained changes in sanitizer output after you’ve already dialed in the feeder\u003c\/li\u003e\n    \u003cli\u003eVisible cracking, warping, or leak paths around the valve assembly\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eShut off the pump and relieve system pressure before servicing the feeder.\u003c\/li\u003e\n    \u003cli\u003eSet the feeder to minimum output prior to disassembly (helps prevent sudden dosing changes on restart).\u003c\/li\u003e\n    \u003cli\u003eInspect and clean the feeder internals while open; debris or scale buildup can affect output.\u003c\/li\u003e\n    \u003cli\u003eAfter replacement, restart at a conservative setting and fine-tune over 24–48 hours while testing water.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eRelated Products\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/pages\/search-results-page?q=R175009\"\u003eRainbow HC Series Hose Bib \/ Drain Valve (R175009)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/pages\/search-results-page?q=R172082\"\u003eRainbow HC Series Flow Rate Indicator (R172082)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/pages\/search-results-page?q=R172036Z\"\u003eSilicone Lubricant for O-rings and seals (R172036Z)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/pages\/search-results-page?q=R172385D\"\u003eRainbow HC Series Lid Assembly (R172385D)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/pages\/search-results-page?q=HC-3315\"\u003eHC-3315 feeder parts\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/pages\/search-results-page?q=HC-3330\"\u003eHC-3330 feeder parts\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/pages\/search-results-page?q=HC-3340\"\u003eHC-3340 feeder parts\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eMaintenance Tips\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eKeep water chemistry balanced—high calcium hardness and high pH accelerate scale buildup that can affect output control.\u003c\/li\u003e\n    \u003cli\u003ePeriodically inspect feeder fittings and seals for minor leaks; small leaks can cause big changes in dosing over time.\u003c\/li\u003e\n    \u003cli\u003eWhen servicing the feeder, clean and lightly lubricate O-rings with silicone lube (never petroleum-based products).\u003c\/li\u003e\n    \u003cli\u003eAfter any adjustment, retest free chlorine\/bromine and pH the next day and fine-tune gradually.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n","brand":"Pentair","offers":[{"title":"Default Title","offer_id":52589955154236,"sku":"R172439","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/3280\/9276\/files\/pentair-hc-series-control-valve-r172439-miscellaneous-1117941.jpg?v=1770941186","url":"https:\/\/aquapoolsupply.com\/products\/pentairhcseriescontrolvalver172439penr172439","provider":"Aqua Pool Supply","version":"1.0","type":"link"}